RT Journal Article
T1 The Sensitivity of Tsunami Impact to Earthquake Source Parameters and Manning Friction in High-Resolution Inundation Simulations
A1 Gibbons, Steven J.
A1 Lorito, Stefano
A1 de la Asunción, Marc
A1 Volpe, Manuela
A1 Selva, Jacopo
A1 Macías, Jorge
A1 Sánchez-Linares, Carlos
A1 Brizuela, Beatriz
A1 Vöge, Malte
A1 Tonini, Roberto
A1 Lanucara, Piero
A1 Glimsdal, Sylfest
A1 Romano, Fabrizio
A1 Meyer, Jan Christian
A1 Lovholt, Finn
K1 Tsunami
AB In seismically active regions with variable dominant focal mechanisms, there is considerable tsunami inundation height uncertainty. Basic earthquake source parameters such as dip, strike, and rake affect significantly the tsunamigenic potential and the tsunami directivity. Tsunami inundation is also sensitive to other properties such as bottom friction. Despite their importance, sensitivity to these basic parameters is surprisingly sparsely studied in literature. We perform suites of systematic parameter searches to investigate the sensitivity of inundation at the towns of Catania and Siracusa on Sicily to changes both in the earthquake source parameters and the Manning friction. The inundation is modelled using the Tsunami-HySEA shallow water code on a system of nested topo-bathymetric grids with a finest spatial resolution of 10 m. This GPU-based model, with significant HPC resources, allows us to perform large numbers of high- resolution tsunami simulations. We analyze the variability of different hydrodynamic parameters due to large earthquakes with uniform slip at different locations, focal depth, and different source parameters. We consider sources both near the coastline, in which significant near-shore co-seismic deformation occurs, and offshore, where near- shore co-seismic deformation is negligible. For distant offshore earthquake sources, we see systematic and intuitive changes in the inundation with changes in strike, dip, rake, and depth. For near-shore sources, the dependency is far more complicated and co- determined by both the source mechanisms and the coastal morphology. The sensitivity studies provide directions on how to resolve the source discretization to optimize the number of sources in Probabilistic Tsunami Hazard Analysis, and they demonstrate a need for a far finer discretization of local sources than for more distant sources.
PB Frontiers
YR 2022
FD 2022-01-25
LK https://hdl.handle.net/10630/32877
UL https://hdl.handle.net/10630/32877
LA spa
NO Gibbons SJ, Lorito S,de la Asunción M, Volpe M, Selva J,Macías J, Sánchez-Linares C,Brizuela B, Vöge M, Tonini R,Lanucara P, Glimsdal S, Romano F,Meyer JC and Løvholt F (2022) TheSensitivity of Tsunami Impact toEarthquake Source Parameters andManning Friction in High-ResolutionInundation Simulations.Front. Earth Sci. 9:757618.doi: 10.3389/feart.2021.757618
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026